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-rw-r--r--kernel/arch/arm/mach-shmobile/smp-r8a7791.c65
1 files changed, 65 insertions, 0 deletions
diff --git a/kernel/arch/arm/mach-shmobile/smp-r8a7791.c b/kernel/arch/arm/mach-shmobile/smp-r8a7791.c
new file mode 100644
index 000000000..5e2d1db79
--- /dev/null
+++ b/kernel/arch/arm/mach-shmobile/smp-r8a7791.c
@@ -0,0 +1,65 @@
+/*
+ * SMP support for r8a7791
+ *
+ * Copyright (C) 2013 Renesas Solutions Corp.
+ * Copyright (C) 2013 Magnus Damm
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/smp.h>
+#include <linux/io.h>
+
+#include <asm/smp_plat.h>
+
+#include "common.h"
+#include "platsmp-apmu.h"
+#include "r8a7791.h"
+#include "rcar-gen2.h"
+
+static struct rcar_apmu_config r8a7791_apmu_config[] = {
+ {
+ .iomem = DEFINE_RES_MEM(0xe6152000, 0x188),
+ .cpus = { 0, 1 },
+ }
+};
+
+static void __init r8a7791_smp_prepare_cpus(unsigned int max_cpus)
+{
+ /* let APMU code install data related to shmobile_boot_vector */
+ shmobile_smp_apmu_prepare_cpus(max_cpus,
+ r8a7791_apmu_config,
+ ARRAY_SIZE(r8a7791_apmu_config));
+
+ rcar_gen2_pm_init();
+}
+
+static int r8a7791_smp_boot_secondary(unsigned int cpu,
+ struct task_struct *idle)
+{
+ /* Error out when hardware debug mode is enabled */
+ if (rcar_gen2_read_mode_pins() & BIT(21)) {
+ pr_warn("Unable to boot CPU%u when MD21 is set\n", cpu);
+ return -ENOTSUPP;
+ }
+
+ return shmobile_smp_apmu_boot_secondary(cpu, idle);
+}
+
+struct smp_operations r8a7791_smp_ops __initdata = {
+ .smp_prepare_cpus = r8a7791_smp_prepare_cpus,
+ .smp_boot_secondary = r8a7791_smp_boot_secondary,
+#ifdef CONFIG_HOTPLUG_CPU
+ .cpu_disable = shmobile_smp_cpu_disable,
+ .cpu_die = shmobile_smp_apmu_cpu_die,
+ .cpu_kill = shmobile_smp_apmu_cpu_kill,
+#endif
+};